For reciprocal altruism to work, individuals must be able to:
A. recognize one another.
B. remember previous interactions.
C. calculate the fitness value of individual
interactions.
D. recognize one another and remember
previous interactions.
E. recognize one another, remember
previous interactions, and calculate the
fitness value of individual interactions.
D
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Which of the following animals is correctly paired with its feeding mechanism?
A) lion â€" substrate feeder B) baleen whale â€" fluid feeder C) aphid â€" suspension feeder D) clam â€" substrate feeder E) snake â€" bulk feeder
The nucleolus is a highly active region of the nucleus that is required for synthesis of ribosomes.
Answer the following statement true (T) or false (F)
Mitotic recombination occurs between homologous chromosomes. In which of the following would you not expect to encounter mitotic recombination?
A) e. coli B) tobacco plants C) homo sapiens D) drosophila melanogaster
The Na+ and K+ ion gradients across the plasma membrane are produced primarily by the
a. permeability of these ions across the lipid bilayer. b. ratio of these ions in the blood. c. action of the Na+-K+ pump. d. flow of these ions through voltage-gated channels.